Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Charles Waltzer, CASAC

Addiction (Substance Use Disorder) Counselor in New York, NY · enumerated 2008.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1831342344

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Registry record

Entity type Individual (Type 1)

Name Charles Waltzer

Credential CASAC

Sex Male

Practice address 19 Union Sq W, 7th Floor, New York, NY, 10003

Phone (212) 627-9600

Fax (212) 627-4040

Enumeration date Oct 28, 2008

Last updated in NPPES Oct 28, 2008

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers Primary

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

What specialty is Charles Waltzer?

Charles Waltzer is registered in NPPES with the primary taxonomy of Addiction (Substance Use Disorder) Counselor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-10-28.